diff --git a/go/vendor/github.com/go-openapi/spec/operation.go b/go/vendor/github.com/go-openapi/spec/operation.go
new file mode 100644
index 0000000..32f7d8f
--- /dev/null
+++ b/go/vendor/github.com/go-openapi/spec/operation.go
@@ -0,0 +1,259 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package spec
+
+import (
+	"encoding/json"
+
+	"github.com/go-openapi/jsonpointer"
+	"github.com/go-openapi/swag"
+)
+
+// OperationProps describes an operation
+type OperationProps struct {
+	Description  string                 `json:"description,omitempty"`
+	Consumes     []string               `json:"consumes,omitempty"`
+	Produces     []string               `json:"produces,omitempty"`
+	Schemes      []string               `json:"schemes,omitempty"` // the scheme, when present must be from [http, https, ws, wss]
+	Tags         []string               `json:"tags,omitempty"`
+	Summary      string                 `json:"summary,omitempty"`
+	ExternalDocs *ExternalDocumentation `json:"externalDocs,omitempty"`
+	ID           string                 `json:"operationId,omitempty"`
+	Deprecated   bool                   `json:"deprecated,omitempty"`
+	Security     []map[string][]string  `json:"security,omitempty"` //Special case, see MarshalJSON function
+	Parameters   []Parameter            `json:"parameters,omitempty"`
+	Responses    *Responses             `json:"responses,omitempty"`
+}
+
+// MarshalJSON takes care of serializing operation properties to JSON
+//
+// We use a custom marhaller here to handle a special cases related to
+// the Security field. We need to preserve zero length slice
+// while omitting the field when the value is nil/unset.
+func (op OperationProps) MarshalJSON() ([]byte, error) {
+	type Alias OperationProps
+	if op.Security == nil {
+		return json.Marshal(&struct {
+			Security []map[string][]string `json:"security,omitempty"`
+			*Alias
+		}{
+			Security: op.Security,
+			Alias:    (*Alias)(&op),
+		})
+	}
+	return json.Marshal(&struct {
+		Security []map[string][]string `json:"security"`
+		*Alias
+	}{
+		Security: op.Security,
+		Alias:    (*Alias)(&op),
+	})
+}
+
+// Operation describes a single API operation on a path.
+//
+// For more information: http://goo.gl/8us55a#operationObject
+type Operation struct {
+	VendorExtensible
+	OperationProps
+}
+
+// SuccessResponse gets a success response model
+func (o *Operation) SuccessResponse() (*Response, int, bool) {
+	if o.Responses == nil {
+		return nil, 0, false
+	}
+
+	for k, v := range o.Responses.StatusCodeResponses {
+		if k/100 == 2 {
+			return &v, k, true
+		}
+	}
+
+	return o.Responses.Default, 0, false
+}
+
+// JSONLookup look up a value by the json property name
+func (o Operation) JSONLookup(token string) (interface{}, error) {
+	if ex, ok := o.Extensions[token]; ok {
+		return &ex, nil
+	}
+	r, _, err := jsonpointer.GetForToken(o.OperationProps, token)
+	return r, err
+}
+
+// UnmarshalJSON hydrates this items instance with the data from JSON
+func (o *Operation) UnmarshalJSON(data []byte) error {
+	if err := json.Unmarshal(data, &o.OperationProps); err != nil {
+		return err
+	}
+	if err := json.Unmarshal(data, &o.VendorExtensible); err != nil {
+		return err
+	}
+	return nil
+}
+
+// MarshalJSON converts this items object to JSON
+func (o Operation) MarshalJSON() ([]byte, error) {
+	b1, err := json.Marshal(o.OperationProps)
+	if err != nil {
+		return nil, err
+	}
+	b2, err := json.Marshal(o.VendorExtensible)
+	if err != nil {
+		return nil, err
+	}
+	concated := swag.ConcatJSON(b1, b2)
+	return concated, nil
+}
+
+// NewOperation creates a new operation instance.
+// It expects an ID as parameter but not passing an ID is also valid.
+func NewOperation(id string) *Operation {
+	op := new(Operation)
+	op.ID = id
+	return op
+}
+
+// WithID sets the ID property on this operation, allows for chaining.
+func (o *Operation) WithID(id string) *Operation {
+	o.ID = id
+	return o
+}
+
+// WithDescription sets the description on this operation, allows for chaining
+func (o *Operation) WithDescription(description string) *Operation {
+	o.Description = description
+	return o
+}
+
+// WithSummary sets the summary on this operation, allows for chaining
+func (o *Operation) WithSummary(summary string) *Operation {
+	o.Summary = summary
+	return o
+}
+
+// WithExternalDocs sets/removes the external docs for/from this operation.
+// When you pass empty strings as params the external documents will be removed.
+// When you pass non-empty string as one value then those values will be used on the external docs object.
+// So when you pass a non-empty description, you should also pass the url and vice versa.
+func (o *Operation) WithExternalDocs(description, url string) *Operation {
+	if description == "" && url == "" {
+		o.ExternalDocs = nil
+		return o
+	}
+
+	if o.ExternalDocs == nil {
+		o.ExternalDocs = &ExternalDocumentation{}
+	}
+	o.ExternalDocs.Description = description
+	o.ExternalDocs.URL = url
+	return o
+}
+
+// Deprecate marks the operation as deprecated
+func (o *Operation) Deprecate() *Operation {
+	o.Deprecated = true
+	return o
+}
+
+// Undeprecate marks the operation as not deprected
+func (o *Operation) Undeprecate() *Operation {
+	o.Deprecated = false
+	return o
+}
+
+// WithConsumes adds media types for incoming body values
+func (o *Operation) WithConsumes(mediaTypes ...string) *Operation {
+	o.Consumes = append(o.Consumes, mediaTypes...)
+	return o
+}
+
+// WithProduces adds media types for outgoing body values
+func (o *Operation) WithProduces(mediaTypes ...string) *Operation {
+	o.Produces = append(o.Produces, mediaTypes...)
+	return o
+}
+
+// WithTags adds tags for this operation
+func (o *Operation) WithTags(tags ...string) *Operation {
+	o.Tags = append(o.Tags, tags...)
+	return o
+}
+
+// AddParam adds a parameter to this operation, when a parameter for that location
+// and with that name already exists it will be replaced
+func (o *Operation) AddParam(param *Parameter) *Operation {
+	if param == nil {
+		return o
+	}
+
+	for i, p := range o.Parameters {
+		if p.Name == param.Name && p.In == param.In {
+			params := append(o.Parameters[:i], *param)
+			params = append(params, o.Parameters[i+1:]...)
+			o.Parameters = params
+			return o
+		}
+	}
+
+	o.Parameters = append(o.Parameters, *param)
+	return o
+}
+
+// RemoveParam removes a parameter from the operation
+func (o *Operation) RemoveParam(name, in string) *Operation {
+	for i, p := range o.Parameters {
+		if p.Name == name && p.In == name {
+			o.Parameters = append(o.Parameters[:i], o.Parameters[i+1:]...)
+			return o
+		}
+	}
+	return o
+}
+
+// SecuredWith adds a security scope to this operation.
+func (o *Operation) SecuredWith(name string, scopes ...string) *Operation {
+	o.Security = append(o.Security, map[string][]string{name: scopes})
+	return o
+}
+
+// WithDefaultResponse adds a default response to the operation.
+// Passing a nil value will remove the response
+func (o *Operation) WithDefaultResponse(response *Response) *Operation {
+	return o.RespondsWith(0, response)
+}
+
+// RespondsWith adds a status code response to the operation.
+// When the code is 0 the value of the response will be used as default response value.
+// When the value of the response is nil it will be removed from the operation
+func (o *Operation) RespondsWith(code int, response *Response) *Operation {
+	if o.Responses == nil {
+		o.Responses = new(Responses)
+	}
+	if code == 0 {
+		o.Responses.Default = response
+		return o
+	}
+	if response == nil {
+		delete(o.Responses.StatusCodeResponses, code)
+		return o
+	}
+	if o.Responses.StatusCodeResponses == nil {
+		o.Responses.StatusCodeResponses = make(map[int]Response)
+	}
+	o.Responses.StatusCodeResponses[code] = *response
+	return o
+}